/Engine/Source/Developer/CookedEditor/Public/CookedEditorPackageManager.h
Gathers the packages this PackageManager wants to manage (ie cook)
virtual void GatherAllPackages ( [TArray](API\Runtime\Core\Containers\TArray)< [FName](API\Runtime\Core\UObject\FName) > & PackageNames, const [ITargetPlatform](API\Developer\TargetPlatform\Interfaces\ITargetPlatform) * TargetPlatform ) const